validate node only after upgrade is called

dao/src/main/java/org/thingsboard/server/dao/rule/BaseRuleChainService.java

@@ -155,7 +155,7 @@ public class BaseRuleChainService extends AbstractEntityService implements RuleC
         if (ruleChain == null) {
             return RuleChainUpdateResult.failed();
         }
-        RuleChainDataValidator.validateMetaData(ruleChainMetaData);
+        RuleChainDataValidator.validateMetaDataFieldsAndConnections(ruleChainMetaData);
 
         List<RuleNode> nodes = ruleChainMetaData.getNodes();
         List<RuleNode> toAddOrUpdate = new ArrayList<>();
@@ -194,6 +194,7 @@ public class BaseRuleChainService extends AbstractEntityService implements RuleC
             for (RuleNode node : toAddOrUpdate) {
                 node.setRuleChainId(ruleChainId);
                 node = ruleNodeUpdater.apply(node);
+                RuleChainDataValidator.validateRuleNode(node);
                 RuleNode savedNode = ruleNodeDao.save(tenantId, node);
                 relations.add(new EntityRelation(ruleChainMetaData.getRuleChainId(), savedNode.getId(),
                         EntityRelation.CONTAINS_TYPE, RelationTypeGroup.RULE_CHAIN));

dao/src/main/java/org/thingsboard/server/dao/service/validator/RuleChainDataValidator.java

@@ -87,15 +87,18 @@ public class RuleChainDataValidator extends DataValidator<RuleChain> {
     }
 
     public static List<Throwable> validateMetaData(RuleChainMetaData ruleChainMetaData) {
-        ConstraintValidator.validateFields(ruleChainMetaData);
-        List<Throwable> throwables = ruleChainMetaData.getNodes().stream()
+        validateMetaDataFieldsAndConnections(ruleChainMetaData);
+        return ruleChainMetaData.getNodes().stream()
                 .map(RuleChainDataValidator::validateRuleNode)
                 .filter(Objects::nonNull)
                 .collect(Collectors.toList());
+    }
+
+    public static void validateMetaDataFieldsAndConnections(RuleChainMetaData ruleChainMetaData) {
+        ConstraintValidator.validateFields(ruleChainMetaData);
         if (CollectionUtils.isNotEmpty(ruleChainMetaData.getConnections())) {
             validateCircles(ruleChainMetaData.getConnections());
         }
-        return throwables;
     }
 
     public static Throwable validateRuleNode(RuleNode ruleNode) {